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Facworld Ezine 22 Transducer   Message List  
Reply | Forward Message #31 of 70 |

***********************************************************

FACWORLD EZINE
The Facilities, Mechanical, Electrical Resource Center

***********************************************************


October 2, 2003
Editor: Thomas Yoon

contact: http://www.free-marine.com/emailform.htm
Publisher: Facworld Ezine


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IN THIS ISSUE
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Publisher's Note
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Publisher's Note
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Hi there,

Complex control systems all make use of signals that can be
easily measured and altered remotely. Automatically operated
machines or actuators need to be powered either by electrical
motors, pneumatic or hydraulic cylinders.

The most common signals sent out from a transducer are
electrical current or voltage and pneumatic pressure. These
signals are easily translated by controllers. Visual measuring
devices like liquid bulb thermometers are not able to be used
in automatic control systems because there are no electrical
or pneumatic signals.

However, when some other component is added to it to enable it
to give a corresponding signal, then the measuring unit becomes
a transducer.

A transducer is a device to convert a signal (representing a
physical quantity) of one form into a corresponding signal of
another form, retaining the amplitude variations of energy
being converted.

Just as an example, a microphone is a sound transducer (acoustic
to electrical) and a loudspeaker is an electrical transducer
(electrical to acoustic). A transducer may be an integral part
of the measuring unit, for example pressure to displacement in
a Bourdon pressure gauge. It may also be a separate unit with
converter specially matched to change the signal to a better
form for remote transmission, e.g. displacement to electrical
in a differential transformer.

How do these transducers work?

To convert physical movement to electrical signals, some devices
make use of variable resistors. Any movement will cause a slider
contact to change position against a resistance wire causing a
change in electrical current or voltage. Other devices may make
use of the movement to alter the position of an induction coil
relative to the magnetic core, causing a change in the induced
current in the circuit. Others may make use of the movement to
change the air gap between two capacitance plates, causing a
change in the current in the circuit.

In the case of the loudspeaker, the opposite effect takes place.
Electrical signals are converted to movement.

Some pneumatic transducers make use of changing air signals to
cause a corresponding mechanical movement in the flapper and
linkages. This movement is then converted to electrical signals
by the methods above. So it takes 3 steps of conversion before
we can get the electrical signal.

Once the electrical signal is obtained, it can be used to compare
to the set value in the controller, and a whole control system can
be designed from it.

Well folks, get your signals and be in control!


Until next time...

Thomas Yoon
Editor, Facworld Ezine
More information can be obtained at
http://facworld.tripod.com
http://www.free-marine.com


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Article
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Get Control of your Email Before it Controls You
By Merle http://www.MCPromotions.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


Ask any online entrepreneur where they spend the bulk
of their time and they'll tell you they are reading
and responding to e-mail. If you run an online business
you may receive hundreds of messages a day. It comes
with the territory and unfortunately, there's no escaping
it. Keeping up with your e-mail is very important to your
success online and you should make every attempt to answer
any and all messages within 24 to 48 hours.


Here are some tips for streamlining the amount of time
you spend managing your inbox.


1) Folders: Set up folders to better organize your e-mail
and find things more readily when you need them. For
example, you may want to set up folders named after indiv-
uals you get frequent mail from, folders for ezines you
receive, software receipts, and others. When you need
something, you will know exactly where to find it.


2) Blocked Senders List: Face it, we all get Spam
and the more active you are online, the more of it
you'll receive. Take it from me, I know. I get
hundreds daily on everything from growing certain
parts of my anatomy (including ones I don't have),
to how I can become a millionaire overnight. An
easy way to rid yourself of Spam is to highlight
the message and add it to your email client's blocked
sender's list. Most all programs include this feature.
Once you add someone to this list you'll never receive
another e-mail from that address again.


Another option to reduce the amount of Spam you
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3) Message Rules: Make sure you set up message rules
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incoming messages to their appropriate folders. For
example, you can set up a message rule that says if
email arrives to a certain email address, reply with
a prefabbed text document you have created in advance.
Also known as autoresponders, message rules make it
easy to automatically reply to messages, send messages
directly to the trash and more. This is a powerful
feature; study it and use it.


4) Empty Deleted/Sent Folders: Make sure you go into
your sent box and deleted message folders on a regular
basis and delete their contents. Messages can pile up
quickly and slow down your e-mail client substantially.


5) Software: Many software manufacturers make add on
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Nelson Email Organizer
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6) Do Something: Don't allow messages to build up in your
inbox or before you know it you'll be buried alive in
messages. As you go through your mail, try to act on
every piece of mail you receive immediately.Reply to
it, delete it, or file it in one of your folders.
Just make sure you do something. If you follow this
advice you'll never end up with 500 sitting in your
inbox demanding your attention.


7) Print It: If you're like me, you subscribe to a lot
of ezines. If you don't have time to read them online
do what I do: print them out and take them on the road
with you. I read them while waiting for appointments or
when I'm on break or lunch at my night job.


8) Customize Layouts: Most e-mail clients allow you
to customize the toolbars and look of your program.
Add the features you use most often to the toolbars
and change the look of the layout to suit your needs.


9) Return Receipts: Have you ever sent a message and
wondered if the recipient ever received it? Send your
e-mail with a "return receipt" request and you'll be
sent a notification by e-mail when they have read it.
The reader can stop this message from going out to you,
but nine out of ten don't mind and allow the reply.


10) Message Priority: When you send an e-mail you
can set the priority of the message to "high," which
puts a red marker or flag next to it when the recipient
receives it. This tells the reader that the message
is very important and may help motivate them to
reply sooner. Just don't get in the habit of sending
every message this way or people will get annoyed.
Only use it for important correspondence.


For a great ezine that will help you be even more
productive with your email go to http://www.email911.com/


If you follow these top 10 tips, you won't find
yourself drowning in e-mails and you'll spend less
time managing it. Remember, you need to control your
e-mail, don't let it control you.


---------------------------------------------------------
To reproduce this article please include the following
=========================================================
Merle http://www.EzineAdAuction.com
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* Only 1 free ad per month, per subscriber.
* Maximum of 65 characters per line.
* Solo Ads 30 lines, including url and email address.
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* Sponsored Ads 5 lines, including url and email address.
* Free Ads 3 lines, including url and email address.
* No Adult, chain letters, astrology, gambling, hate,
racial, pornographic, or illegal material.
* First come first served.


To Submit Your Paying and Free Ads:
send to http://www.free-marine.com/ezine.htm


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Solo ads US$30.00 - 30 lines including url, 65 characters/line
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Sponsored ads US$7.00 - 5 lines including url, 65 characters/line


Payment for paying ads can be made by credit card at:

http://www.free-marine.com/payingad.htm

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Contact Information
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Thomas Yoon, Publisher/Editor
4186 Bagan Luar Road
12000 Butterworth
Malaysia
604-4095166

Contact me at http://www.free-marine.com/emailform.htm


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